derioderio
derioderio t1_j2sql24 wrote
Reply to comment by Pink_Axolotl151 in How are birth control failure rates even calculated? by [deleted]
That's just pretty basic math though:
1-(1-0.2)^10 = 0.18
1-(1-0.18)^10 = 0.86
etc.
derioderio t1_ixaorek wrote
Reply to comment by Grundyloop in How do astronomers share coordinates with each other? by vaterp
Why don't they just use Earth's rotation axis, or Polaris? Is that because Earth's axis wobbles slightly, and the star positions slowly change over 1000s of years?
derioderio t1_iwyvjdh wrote
Reply to comment by Theleachan in Are there objects in the universe that are not in motion at all? by ProphetMoham
It’s even more meaningless because the fundamental principle of the theory of relativity is that there is no preferred reference frame that could be used to determine an objective ‘center’: any reference frame in uniform motion is as valid as any other.
derioderio t1_ivpub5k wrote
Reply to comment by mayonnace in Does the dna of transplanted organs (organic material) change after the recipient successfully recovers? by theZoid42
I said generally because I'm not enough of an expert to know if there are exceptions, not because I know that there are exceptions.
derioderio t1_ivorruk wrote
Reply to Does the dna of transplanted organs (organic material) change after the recipient successfully recovers? by theZoid42
Generally no. The recipient has to take immunosuppressants for the rest of their life so that their immune system doesn’t attack the ‘foreign’ cells in the transplanted organ.
derioderio t1_j9p4tzj wrote
Reply to comment by Jason-_B in How did the placenta evolve? by fil-
Do we have any fossil examples of any intermediates between egg-laying mammals and placental mammals?